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Heat pump control unit
Frost protection only
Frost protection function
■ The frost protection function will be started when the outside tem-
perature drops below approx. +1 °C.
With active frost protection, the heating circuit pump will be switched
on and the flow temperature in the secondary circuit will be main-
tained at a lower temperature of approx. 20 °C.
The DHW cylinder will be heated to approx. 20 °C.
■ The frost protection function will be stopped when the outside tem-
perature rises above approx. +3 °C.
Heating and cooling curve settings (slope and level)
The Vitotronic 200 regulates the flow temperatures for the heating/
cooling circuits in weather-compensated mode.
■ System flow temperature or flow temperature of heating circuit with-
out mixer A1
■ Flow temperature, heating circuit with mixer M2:
Depending on the heat pump, the mixer motor is either directly con-
trolled by the control unit or via the KM BUS.
■ Flow temperature, heating circuit with mixer M3:
Not available for all heat pumps; mixer motor controlled via the KM
BUS.
■ Flow temperature for cooling via heating circuit; the separate cooling
circuit is regulated in weather-compensated mode.
The flow temperature required to reach a specific room temperature
depends on the heating system and the thermal insulation of the build-
ing to be heated or cooled.
Adjusting the heating or cooling curves matches the flow temperatures
to these conditions.
■ Heating curves:
The flow temperature of the secondary circuit is restricted at the
upper end of the scale by the temperature limiter and the max. tem-
perature set at the heat pump control unit.
5
90
80
70
60
50
40
30
20
20
10
Outside temperature in °C
Heating systems with heating water buffer cylinder or low loss header
If using hydraulic separation, fit a temperature sensor in the heating
water buffer cylinder or low loss header and connect to the heat pump
control unit.
Outside temperature sensor
Installation location:
■ North or north-western wall of the building
■ 2 to 2.5 m above the ground, for multi storey buildings in the upper
half of the second floor
Connection:
VIESMANN
56
(cont.)
Heating curve slope
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
-10
-20
-30
The operating programs can also be switched over externally, e.g. by
Vitocom 100.
■ Cooling curves:
The flow temperature of the secondary circuit is restricted at the
lower end of the scale by the min. temperature set at the heat pump
control unit.
Outside temperature in °C
35
30
0.2
0.4
0.6
0.8
1.0
1.2
1.4 1.6
1.8 2.0 2.2
2.6
3.0
3.4
Cooling curve slope
■ 2-core lead, length max. 35 m with a cross-section of 1.5 mm
per).
■ Never route this lead immediately next to 230/400 V cables.
25
20
20
15
10
5
1
2
(cop-
VITOCAL 200-S
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